The Aftermarket EFI buyer’s guide, courtesy of …

1 The Aftermarket EFI buyer's guide , courtesy of We often receive inquiries from customers asking which Aftermarket electronic fuel injection system is the best one. Rather than steering our customers toward a particular system, we prefer to enable them to make an informed decision when selecting an Aftermarket EFI system. While currently offers systems from ACCEL DFI, BigStuff3, Holley and FAST, each offer features that make them well suited for a particular application. We sell many of each, finding that our customers are equally satisfied. Their satisfaction is the product of careful consideration of their needs before the purchase, matching the system to the functionality required by their application. It isn't a matter of whether a particular system is better for street or racing, but rather pairing carefully matched components with a proper calibration. We have created a spreadsheet, which provides a summary view of the features of each of the systems we sell.

2 A. copy is available for download at: In addition to our brief feature listing spreadsheet, we have also developed this 11. page Aftermarket EFI buyer's guide to better equip you to determine which system will best serve you and your application. Many Aftermarket EFI buyers initially find it difficult to determine what parts they need to perform a complete Aftermarket EFI installation on their vehicle. Our Aftermarket EFI systems are available as basic kits including only and ECU and wiring harnesses or as complete systems. If you're looking for a comprehensive, no-hassle solution, you will likely find the FAST XFI and EZ EFI Ready To Run systems are your best bet. These systems include an Aftermarket EFI. ECU, interface cable and software, wiring harnesses, sensors, intake manifold/fuel rail assembly, throttle body, fuel injectors, fuel pump and distributor. These systems also offer added value as our suppliers to offer a package discount, which we're able to pass along to our customers.

3 In addition to the standard packages posted on our site, we're also sometimes able to substitute or upgrade package components to better meet the needs of a specific application. Common system customizations include fuel pump and/or fuel injector upgrades and MAP sensor upgrades for boosted applications. While complete systems are a common choice for those converting an older engine, many customers have engines that come originally equipped with electronic fuel injection. These vehicles often need only the electronics (ECU), interface harnesses and possibly a basic sensor kit (MAP, IAT, ECT). These customers may or may not opt to upgrade their manifold, throttle body or fuel injectors (all available from ). These applications may employ any of our popular systems (BigStuff3, Holley, FAST EZ EFI or FAST XFI) in any of a number of configurations. It can at times be confusing to figure out which parts you may need to perform a complete installation of an Aftermarket EFI system.

4 Each system is configured a bit differently. By referring to the following pages one will gain a better idea of 1. what parts are required for your installation and which system will best enable you to meet your engine management objectives. BIG STUFF 3 systems: These systems are sold mainly in the form of ECU/harness kits, but are available for a wide variety of applications. The base systems include an ECU, wiring harnesses, software, Wideband O2 sensor and communication cable. Many optional components are available, see our website at: for a list of available features. We've also recently developed complete turnkey systems for those customers wanting a complete system solution with a Bigstuff3 ECU. Figure 1 - Big Stuff 3 Gen 3 PRO SEFI ECU. Application facts: Systems for Ford Mod Motor applications do include LS-1 coils, however coil mounting brackets must be fabricated or purchased separately. Systems for GM LS-1 based engines do not include ignition coils.

5 Systems for GM LS-1 engines may be adapted to other applications to provide coil on plug ignition. Doing so requires the use of a Bigstuff3. universal 24T input wheel/pickup assembly and a cam sensor (both GM. and Ford offer OEM cam sync devices for use on V-8 engines originally equipped with a distributor). Popular options include: Dual Wideband O2 control Traction control Integral (PC free) internal/external channel data logging 2. 24 injector control RacePak digital dash FAST XFI systems: These systems are sold in ECU/harness form as well as complete ready to run . systems and are available for a wide variety of applications. The base system includes an ECU, software, wideband O2 sensor and communication cable. XFI. systems are very powerful and flexible systems, which offer extensive functionality including multiple stage nitrous control, launch timing modification, boost control and much more. Figure 2 - FAST XFI "Ready to Run" system If you're planning to assemble a system from separate components, we recommend the following: FAST XFI base kit Main Harness Injector harness Ignition adapter harness Sensor kit 3.

6 Figure 3 - FAST XFI base kit Other popular components include: FAST XFI dual sync distributor Fan/fuel pump control harnesses XIM Ignition module TCU transmission controller and adapter harness Fuel Injectors Fuel pump Throttle body Popular options include: Traction control (ITC). PC free internal channel data logging PC free external channel data logging (Accelerometer, EGT, fuel pressure, oil pressure). Digital touch screen LCD dash/logger Application facts: With the addition of the appropriate XIM Ignition module kit, the XFI may be adapted to Ford Modular, GM LS-1, New HEMI and other coil on plug ignition applications. With the addition of the TCU (transmission control unit) the XFI may be utilized in conjunction with electronically controlled GM, Ford and Chrysler late model transmissions. FAST has recently added a self tuning function to the XFI to simplify the calibration/development of the VE table For more information on the Ready to Run kits, please visit our website at: For details regarding the new and improved functionality of the FAST XFI please visit our website at: 4.

7 For information on the full FAST XFI product offering, please refer to the following links: FAST XFI Sportsman systems: The FAST XFI Sportsman systems bridge the gap between the XFI and the EZ EFI systems. In addition to a powerful self-tuning strategy, they offer a simplified version of the XFI software that is well suited for most street/strip applications. Unlike the EZ EFI family of systems, the XFI Sportsman is fully compatible with boosted applications, up to 5 bar. Unlike the XFI , the XFI. Sportsman system supports only high impedance injectors. Figure 4 - XFI sportsman ECU. If you're planning to assemble a system from separate components, we recommend the following: FAST XFI Sportsman base kit (includes main harness, fuel pressure and WBO2 sensors). Ignition harness Injector harness Sensor kit Popular options include: FAST eDash 5. FAST EZ EFI systems: These systems are sold in complete TBI (Throttle Body Injection) systems with or without fuel pump and filter and also as multiport retrofit kits and are adaptable to a wide variety of applications.

8 The Original 4 injector EZ EFI TBI system (30226- kit and 30227-kit) supports up to 600hp and includes a TBI unit with integrated fuel injectors and sensors, self tuning ECU, software, wideband O2 sensor and handheld programmer. FAST has also recently developed a more advanced, EZ. EFI This system differs from the original EZ EFI in that the TBI unit utilizes 8. injectors and the ECU also provides ignition timing control. Application facts: These systems are self tuning and require no previous EFI tuning experience Systems include an easy to use programmer that allows quick setup TBI systems are designed for easy carb to efi conversions These systems are only for non power-adder applications and only the EZ. EFI systems provide ignition control. Figure 5 - Original FAST EZ EFI TBI system 6. Figure 6 - Fast EZ EFI TBI system In addition to ignition timing control, the EZ EFI systems also allow easy integration with the FAST EZ LS ignition controller and TCI EZ TCU.

9 Systems may be configured for use with TBI injection or multiport injected applications. For more information on the available EZ EFI kits, please visit our website at: For a pdf brochure on the original EZ EFI TBI kits, please visit our website at: Figure 7 -FAST EZ EFI LS Retrofit system 7. Holley HP EFI systems Figure 8 - HP EFI ECU and Harness System The Holley HP EFI systems offer a great deal of functionality in a compact package. Capable of driving 8 GM LS style smart coils, these systems are very popular for street/strip applications for engines with both distributor and distributorless ignition systems. These systems offer full user tunability of fuel and spark and also support blower, turbo and nitrous use. In addition to functionality found on other basic EFI systems, the HP EFI also support fuel and oil pressure monitoring. The HP EFI is also our most economical option for Ford Modular, Ford Coyote and GM LSX applications. These systems are most commonly ordered in the form of ECU and Harness kits.

10 Contact our sales team today for a quote on an HP EFI system for your application. 8. Figure 9 - Holley Dominator EFI ECU. Holley Dominator EFI systems The big brother to Holley's HP EFI systems, the Dominator EFI systems are among the most powerful Aftermarket systems available. In addition to all the functionality of the HP EFI, the Dominator EFI systems offer built in control of GM. electronic transmissions, boost control, dual WBO2 control as well as an assortment of user configurable input and output channels that allow extensive customization of your EFI installation. These systems are also easily retrofitted to HP EFI installations as they utilize common sensor and power connectors. In addition to the above, Holley has also partnered with Davis technologies to integrate their cutting edge traction control with the Dominator EFI system, through the use of an optional traction control module. Figure 10 - Holley Traction control module by Davis Technologies We recommend contacting our sales staff at for a quote on a complete Dominator EFI or HP EFI system, as many options and configurations are available.